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Siemens SINAMICS G120 List Manual page 1113

Cu250s-2 control units
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F07896
Drive: Load monitoring pump leakage
Message class:
Application/technological function faulted (17)
Reaction:
OFF1 (NONE, OFF2, OFF3)
Acknowledge:
IMMEDIATELY
Cause:
The load monitoring is configured for a pump (p2193 = 4).
The monitoring function detects a leak in the pump circuit.
In this case, the pump requires a torque that is lower than in normal operation to pump the reduced quantity.
See also: p2181, p2182, p2183, p2184, p2186, p2188, p2190, p2193
Remedy:
- remove the leak in the pump circuit.
- for a nuisance trip, reduce the torque thresholds of the leakage characteristic (p2186, p2188, p2190).
F07900 (N, A)
Drive: Motor blocked
Message class:
Application/technological function faulted (17)
Reaction:
OFF2 (NONE, OFF1, OFF3, STOP2)
Acknowledge:
IMMEDIATELY
Cause:
Motor has been operating at the torque limit longer than the time specified in p2177 and below the speed threshold
set in p2175.
This signal can also be triggered if the speed is oscillating and the speed controller output repeatedly goes to its limit.
It may also be the case that thermal monitoring of the power unit reduces the current limit (see p0290), thereby
causing the motor to decelerate.
See also: p2175 (Motor blocked speed threshold), p2177 (Motor blocked delay time)
Remedy:
- check that the motor can freely move.
- check the effective torque limit (r1538, r1539).
- check the parameter, message "Motor blocked" and if required, correct (p2175, p2177).
- check the direction of rotation enable signals for a flying restart of the motor (p1110, p1111).
- for U/f control: check the current limits and acceleration times (p0640, p1120).
F07901
Drive: Motor overspeed
Message class:
Application/technological function faulted (17)
Reaction:
OFF2 (IASC/DCBRK)
Acknowledge:
IMMEDIATELY
Cause:
The maximum permissible speed was either positively or negatively exceeded.
The maximum permissible positive speed is formed as follows: Minimum (p1082, CI: p1085) + p2162
The maximum permissible negative speed is formed as follows: Maximum (-p1082, CI: 1088) - p2162
Remedy:
The following applies for a positive direction of rotation:
- check r1084 and if required, correct p1082, CI:p1085 and p2162.
The following applies for a negative direction of rotation:
- check r1087 and if required, correct p1082, CI:p1088 and p2162.
Activate precontrol of the speed limiting controller (p1401.7 = 1).
Increase the hysteresis for the overspeed signal p2162. This upper limit is dependent upon the maximum motor
speed p0322 and the maximum speed p1082 of the setpoint channel.
F07902 (N, A)
Drive: Motor stalled
Message class:
Application/technological function faulted (17)
Reaction:
OFF2 (IASC/DCBRK, NONE, OFF1, OFF3, STOP2)
Acknowledge:
IMMEDIATELY
Cause:
For a vector drive the system has identified that the motor has stall for a time longer than is set in p2178.
Fault value (r0949, interpret decimal):
1: Stall detection using r1408.11 (p1744, p0492) vector control with encoder.
2: Stall detection using r1408.12 (p1745) or (r0084 ... r0083).
See also: p1744 (Motor model speed threshold stall detection), p2178 (Motor stalled delay time)
SINAMICS G120 CU250S-2 Control Units
List Manual, 09/2017, A5E33842890
4 Faults and alarms
4.2 List of faults and alarms
1113

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